Re: convert markdown to html in new tab

On Jan 11, 2014 1:07 AM, "Jacobo de Vera" <devel@jacobodevera.com> wrote:
>
> On Fri, Jan 10, 2014 at 7:03 PM, Rick Dooling <rpdooling@gmail.com> wrote:
> >
> >> > This one grabs the buffer contents, converts it to HTML, and sends it to the clipboard for pasting into WordPress or whatever.
> >>
> >> > " Send Text Through Filter To Clipboard:
> >> > " http://vim.wikia.com/wiki/Use_filter_commands_to_process_text
> >> > function! MDC()
> >> >         :redir @+
> >> >         " No output file specified so it goes to STDOUT
> >> >         exe '!pandoc %'
> >> >         :redir END
> >> > endfunction
> >>
> >> > This morning I was monkeying with using Python in Vim to do this. That also works. Then you can use Python's Markdown module.
> >>
> >> But does it though? From what I see the line:
> >>
> >> exe '!pandoc %'
> >>
> >> Is running pandoc with the *file* open in the current buffer as input,
> >> which means you have to have a file and you have to save it in order
> >> for it to work. This is similar to what was shown in previous emails,
> >> but what I was wondering is whether one can use something similar that
> >> uses buffer contents, not file contents.
> >>
>
> >
> > if no file is specified with -o in pandoc it goes to STDOUT, and you are using redir to redirect STOUT to the clipboard. At least that's how I understand it.
> >
> > Another scripting angle, esp. using Python or Ruby is just run the commands, save the file, and tell vim to open the file in a new buffer.
> >
> > Now that I've been playing, the redirect to the clipboard is actually even more useful, because you can use Marked2 or some other html converter/viewer to check things before loading your html up to go paste.
> >
> > Rick
> >
>
> Rick, I think you and I are talking about two different things here. I
> am talking about the input and you are talking about the output. So
> yes, pandoc sends its output to stdout, which is captured by Vim. But
> the input, it takes from a file name, which is the value after
> replacing '%' on that exe line.

If it is terminal vim output is not captured. In fact command executed with :! gets direct access to the terminal. For capturing output there is system().

>
> Say you create a new file, then write some markdown, and, before
> saving, you run that function. You'd get nothing, because pandoc
> receives, as input, an empty file. Pandoc, and many other programs,
> however, support getting their input from stdin. In vim you can send
> the contents of the current buffer to a process' stdin, and then the
> process' stdout replaces those contents, just like when one does:
>
> :%!sort
>
> What I was trying to ask is. How does one send those unsaved contents
> to a program without getting them replaced with the output of such
> program, but instead get the output in a separate tab? The function
> you sent provides a solution for the second part, since it will
> redirect output to a variable or a register. Now we are only missing
> the first part, which we nearly have, but it uses files, rather than
> buffer contents.
>
> Hope that clarifies my question a little.
>
> Regards,
>
> --
> Jacobo de Vera
> http://www.jacobodevera.com
> @jovianjake
>
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